Having a smart phone may not be as smart as you think. They may let you surf the Internet, listen to music and take photos wherever you are…but they also turn you into a workaholic（工作狂）,it seems.

    A study suggests that, by giving you access to emails at all times, the smart phone adds as much as two hours to your working day. Experts found that British people work an additional 460 hours a year on average as they are able to respond to emails on their mobiles. The study shows the average UK working day is between 9 and 10 hours, but 2 more hours is spent responding to or sending work emails, or making work calls.

    Almost one in ten admits spending up to three hours outside their normal working day checking work emails. Some workers say they are on call almost 24 hours a day. Nearly two-thirds say they often check work emails just before they go to bed and as soon as they wake up, while over a third have replied to one in the middle of the night. The average time for first checking emails is between 6 a.m and 7 a.m, with more than a third checking their first email in the period, and a quarter checking them between 11 p.m.and midnight.

    Ghadi Hobeika, marketing director of Pixmania, said: “The ability to access millions of Apps has made smart phone invaluable for many people. However, there are disadvantages. Many companies expect their employees to be on call 24 hours a day, seven days a week, and smart phones mean that people cannot get away from work. The more frequently in contact we become, the more is expected of us in a work capacity.”

    This year's flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn't yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.

    The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms have less to do with the virus itself than with your immune(免疫的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.

    The virus usually enters through your mouth, typically by way of your hands. But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.

    The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader, the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation(炎症) throughout the body. But the worst is still to come.

    Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.

    The deadliest Ebola(埃博拉病毒) outbreak in recorded history is happening right now. The outbreak is unprecedented(空前的) both in the number of people who have gotten sick and in the geographic scope. And so far it's been a long battle that doesn't appear to be slowing down.

    Ebola is both rare and very deadly. Since the first outbreak in 1976, Ebola viruses have infected thousands of people and killed roughly 60 percent of them. Symptoms can come on quickly and kill fast.

    The current outbreak started in Guinea sometime in late 2013 or early 2014. It has since spread to Sierra Leone and Liberia, including some capital cities. And one infected patient traveled on a plane to Nigeria, where he spread the disease to several others and then died. Cases have also popped up in various other countries throughout the world, including in Dallas and New York City in the United States.

    The Ebola virus has now hit many countries, including Guinea, Liberia, Sierra Leone, Nigeria, Senegal, and the United States. The virus, which starts off with flu-like symptoms and sometimes ends with bleeding, has infected about 6,500 people and killed more than 3,000 since this winter, according to the World Health Organization on September 30, 2014.

    There are some social and political factors contributing to the current disaster. Because this is the first major Ebola outbreak in West Africa, many of the region's health workers didn't have experience or training in how to protect themselves or care for patients with this disease.

    Journalist David Quammen put it well in a recent New York Times article, "Ebola is more dangerous to humans than perhaps any known virus on Earth, except rabies(狂犬病) and HIV. And it does its damage much faster than either."

Hopefully, researchers are working to find drugs, including a recent $50 million push at the National Institutes of Health. And scientists are working on vaccines(疫苗), including looking into ones that might be able to help wild chimpanzees, which are also susceptible to the disease. The first human Ebola vaccine trial is scheduled to start in the spring of 2015.

    It has taken an extremely long time－161 years－but the National Portrait Gallery finally has the Duke(公爵)of Wellington in its collection after a fundraising campaign reached its ￡1. 3m target.

    The gallery announced on Thursday that it had acquired Sir Thomas Lawrence's unfinished final painting of a man regarded as Britain's greatest soldier after a successful appeal.

    Nicholas Cullinan, the gallery's director, said the NPG had been looking for a suitable painting of the Duke of Wellington since the gallery was founded in 1856.

    He called it "a remarkable painting", while Lucy Peltz, the gallery's senior manager of 18th­century paintings, said the work was "an inspiring and powerful image of one of the most influential men of the 18th and 19th centuries".

    The NPG announced last November that it needed to raise ￡300,000, the final piece of a funding jigsaw(拼图). The Art Fund had already contributed ￡350,000 and the appeal reached its target thanks to ￡200,000 from the G&K Boyes charitable trust and ￡180,000 from the National Heritage Memorial Fund. A further ￡570,000 came from a public appeal and the gallery's own funds.

    It was painted in 1829 when Wellington was prime minister, however, Lawrence died in 1830 leaving the portrait unfinished. The gallery believes it is a more attractive work because of that, with the viewer focusing more on the man himself rather than any clothes of power.

    Dan Snow, the historian and broadcaster, said Wellington was a "Titanic figure" in British history, the only field greatest prime minister, a man of genius on and off the battlefield. He added:" This arresting portrait must sit in the national collection and now, following an outpouring of donation, it will do. The artist has caught the Duke's legendary features. Among his many contributions to British life he formed the culture of unbending spirit in the face of difficulty."

    The painting was lent to the NPG in 2015 for an exhibition marking the Battle of Waterloo.

A facial expression results from one or more motions of the muscles of the face. These movements convey the emotional nonverbal communication. They are a primary means of conveying social information among humans, but also occur in most other mammals and some other animal species.

In the business world, much emphasis is placed on your first words, but it isn't all about what you say. You only have seconds to make a first impression that can make or break a relationship in business. Since the face is the first thing we notice about a person, it's vital to use your face to make that important connection.

Researchers have shown that 55 percent of non-verbal communication is facial. People generally try to mask negative expressions such as disappointment, fear or envy, but these feelings are often reflected in their eyes, or the downward turn of the mouth.

Genuine expressions of anger and surprise can be quite brief, lasting for only a few seconds. If an expression remains longer, it may be a sign of insincerity (不真诚). In general, a genuine expression matches the beginnings of a feeling, so watch for expressions that come after the words.

The research conducted last year by a team from Glasgow University, suggested that people from different cultures read facial expressions differently. Not only can that mean confusion in everyday life, but it can lead to confusion when conducting business.

The study found that East Asian participants tended to focus on the eyes of the other person, while Western subjects took in the whole face, including the eyes and the mouth. The work, which was published in Current Biology journal challenged the idea that facial expressions are universally understood. In the study, East Asians were more likely than Westerners to read the expression for "fear" as "surprise", and "disgust "as "anger".